Fat and Lean Mass
A reduction in testosterone levels may not necessarily lead to a loss of lean mass, as suggested by a study comparing polyunsaturated and saturated fats. Interestingly, the group consuming polyunsaturated fat ended up with more lean mass, raising questions about the underlying mechanisms. Additionally, a small amount of saturated fat appears to be sufficient for cholesterol synthesis, with evidence indicating that low LDL levels can still provide cardiovascular benefits.In this clip
From this podcast

Huberman Lab
Dr Layne Norton: The Science of Eating for Health, Fat Loss & Lean Muscle | Huberman Lab Podcast #97
Related Questions
Can reduced saturated fat intake decrease testosterone levels as discussed in the episode Dr Layne Norton: The Science of Eating for Health, Fat Loss & Lean Muscle | Huberman Lab Podcast #97 and the clip Fat and Lean Mass?
How do saturated fats affect LDL cholesterol levels in the episode Dr Layne Norton: The Science of Eating for Health, Fat Loss & Lean Muscle | Huberman Lab Podcast #97 and the clip Fat and Lean Mass?